No. 456 Squadron RAAF was a Royal Australian Air Force (RAAF) night fighter squadron, operational over Europe during World War II. Amongst other achievements, the squadron was the first RAAF unit to use a roundel featuring a red kangaroo in a blue circle, on some parts of its aircraft. While this insignia was unofficial and the squadron's main markings conformed to the RAF roundels used by British and other Commonwealth units, it inspired the post-war roundel used by the RAAF.